鍍金池/ 教程/ Linux/ lseek()函數(shù) Unix/Linux

outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

getpeername()函數(shù) Unix/Linux

1. getpeername()函數(shù) Unix/Linux

io_setup()函數(shù) Unix/Linux

1. io_setup()函數(shù) Unix/Linux

mknod()函數(shù) Unix/Linux

1. mknod()函數(shù) Unix/Linux

arch_prctl()函數(shù) Unix/Linux

1. arch_prctl()函數(shù) Unix/Linux

inotify_add_watch()函數(shù) Unix/Linux

1. inotify_add_watch()函數(shù) Unix/Linux

chmod()函數(shù) Unix/Linux

1. chmod()函數(shù) Unix/Linux

_exit()函數(shù) Unix/Linux

1. _exit()函數(shù) Unix/Linux

epoll_ctl()函數(shù) Unix/Linux

1. epoll_ctl()函數(shù) Unix/Linux

Unix/Linux系統(tǒng)調(diào)用

1. Unix/Linux系統(tǒng)調(diào)用

futimesat()函數(shù) Unix/Linux

1. futimesat()函數(shù) Unix/Linux

oldolduname()函數(shù) Unix/Linux

1. oldolduname()函數(shù) Unix/Linux

sched_rr_get_interval()函數(shù) Unix/Linux

1. sched_rr_get_interval()函數(shù) Unix/Linux

oldstat()函數(shù) Unix/Linux

1. oldstat()函數(shù) Unix/Linux

pselect()函數(shù) Unix/Linux

1. pselect()函數(shù) Unix/Linux

close()函數(shù) Unix/Linux

1. close()函數(shù) Unix/Linux

add_key()函數(shù) Unix/Linux

1. add_key()函數(shù) Unix/Linux

clone()函數(shù) Unix/Linux

1. clone()函數(shù) Unix/Linux

rename()函數(shù) Unix/Linux

1. rename()函數(shù) Unix/Linux

msgop()函數(shù) Unix/Linux

1. msgop()函數(shù) Unix/Linux

getrlimit()函數(shù) Unix/Linux

1. getrlimit()函數(shù) Unix/Linux

linkat()函數(shù) Unix/Linux

1. linkat()函數(shù) Unix/Linux

ioprio_set()函數(shù) Unix/Linux

1. ioprio_set()函數(shù) Unix/Linux

insw()函數(shù) Unix/Linux

1. insw()函數(shù) Unix/Linux

munlock()函數(shù) Unix/Linux

1. munlock()函數(shù) Unix/Linux

getgid()函數(shù) Unix/Linux

1. getgid()函數(shù) Unix/Linux

chdir()函數(shù) Unix/Linux

1. chdir()函數(shù) Unix/Linux

rmdir()函數(shù) Unix/Linux

1. rmdir()函數(shù) Unix/Linux

ioctl()函數(shù) Unix/Linux

1. ioctl()函數(shù) Unix/Linux

lchown()函數(shù) Unix/Linux

1. lchown()函數(shù) Unix/Linux

execve()函數(shù) Unix/Linux

1. execve()函數(shù) Unix/Linux

epoll_wait()函數(shù) Unix/Linux

1. epoll_wait()函數(shù) Unix/Linux

fstatat()函數(shù) Unix/Linux

1. fstatat()函數(shù) Unix/Linux

truncate()函數(shù) Unix/Linux

1. truncate()函數(shù) Unix/Linux

lock()函數(shù) Unix/Linux

1. lock()函數(shù) Unix/Linux

outsb()函數(shù) Unix/Linux

1. outsb()函數(shù) Unix/Linux

chroot()函數(shù) Unix/Linux

1. chroot()函數(shù) Unix/Linux

kexec_load()函數(shù) Unix/Linux

1. kexec_load()函數(shù) Unix/Linux

afs_syscall()函數(shù) Unix/Linux

1. afs_syscall()函數(shù) Unix/Linux

dup2()函數(shù) Unix/Linux

1. dup2()函數(shù) Unix/Linux

_newselect()函數(shù) Unix/Linux

1. _newselect()函數(shù) Unix/Linux

inotify_rm_watch()函數(shù) Unix/Linux

1. inotify_rm_watch()函數(shù) Unix/Linux

recv()函數(shù) Unix/Linux

1. recv()函數(shù) Unix/Linux

msgsnd()函數(shù) Unix/Linux

1. msgsnd()函數(shù) Unix/Linux

getdtablesize()函數(shù) Unix/Linux

1. getdtablesize()函數(shù) Unix/Linux

ioperm()函數(shù) Unix/Linux

1. ioperm()函數(shù) Unix/Linux

munmap()函數(shù) Unix/Linux

1. munmap()函數(shù) Unix/Linux

getpriority()函數(shù) Unix/Linux

1. getpriority()函數(shù) Unix/Linux

sched_get_priority_min()函數(shù) Unix/Linux

1. sched_get_priority_min()函數(shù) Unix/Linux

outw_p()函數(shù) Unix/Linux

1. outw_p()函數(shù) Unix/Linux

kill()函數(shù) Unix/Linux

1. kill()函數(shù) Unix/Linux

lookup_dcookie()函數(shù) Unix/Linux

1. lookup_dcookie()函數(shù) Unix/Linux

accept()函數(shù) Unix/Linux

1. accept()函數(shù) Unix/Linux

obsolete()函數(shù) Unix/Linux

1. obsolete()函數(shù) Unix/Linux

pread()函數(shù) Unix/Linux

1. pread()函數(shù) Unix/Linux

getgroups()函數(shù) Unix/Linux

1. getgroups()函數(shù) Unix/Linux

personality()函數(shù) Unix/Linux

1. personality()函數(shù) Unix/Linux

recvfrom()函數(shù) Unix/Linux

1. recvfrom()函數(shù) Unix/Linux

putpmsg()函數(shù) Unix/Linux

1. putpmsg()函數(shù) Unix/Linux

getgroups()函數(shù) Unix/Linux

1. getgroups()函數(shù) Unix/Linux

remap_file_pages()函數(shù) Unix/Linux

1. remap_file_pages()函數(shù) Unix/Linux

request_key()函數(shù) Unix/Linux

1. request_key()函數(shù) Unix/Linux

mount()函數(shù) Unix/Linux

1. mount()函數(shù) Unix/Linux

sched_setscheduler()函數(shù) Unix/Linux

1. sched_setscheduler()函數(shù) Unix/Linux

mkdirat()函數(shù) Unix/Linux

1. mkdirat()函數(shù) Unix/Linux

nfsservctl()函數(shù) Unix/Linux

1. nfsservctl()函數(shù) Unix/Linux

getuid()函數(shù) Unix/Linux

1. getuid()函數(shù) Unix/Linux

prof()函數(shù) Unix/Linux

1. prof()函數(shù) Unix/Linux

exit_group函數(shù) Unix/Linux

1. exit_group函數(shù) Unix/Linux

io_cancel()函數(shù) Unix/Linux

1. io_cancel()函數(shù) Unix/Linux

mmap()函數(shù) Unix/Linux

1. mmap()函數(shù) Unix/Linux

mremap()函數(shù) Unix/Linux

1. mremap()函數(shù) Unix/Linux

getitimer()函數(shù) Unix/Linux

1. getitimer()函數(shù) Unix/Linux

unimplemented()函數(shù) Unix/Linux

1. unimplemented()函數(shù) Unix/Linux

read()函數(shù) Unix/Linux

1. read()函數(shù) Unix/Linux

inl()函數(shù) Unix/Linux

1. inl()函數(shù) Unix/Linux

posix_fadvise()函數(shù) Unix/Linux

1. posix_fadvise()函數(shù) Unix/Linux

open()函數(shù) Unix/Linux

1. open()函數(shù) Unix/Linux

listen()函數(shù) Unix/Linux

1. listen()函數(shù) Unix/Linux

io_destroy()函數(shù) Unix/Linux

1. io_destroy()函數(shù) Unix/Linux

acct()函數(shù) Unix/Linux

1. acct()函數(shù) Unix/Linux

fcntl()函數(shù) Unix/Linux

1. fcntl()函數(shù) Unix/Linux

recvmsg()函數(shù) Unix/Linux

1. recvmsg()函數(shù) Unix/Linux

statfs()函數(shù) Unix/Linux

1. statfs()函數(shù) Unix/Linux

oldlstat()函數(shù) Unix/Linux

1. oldlstat()函數(shù) Unix/Linux

outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

getpagesize()函數(shù) Unix/Linux

1. getpagesize()函數(shù) Unix/Linux

sched_yield()函數(shù) Unix/Linux

1. sched_yield()函數(shù) Unix/Linux

outw()函數(shù) Unix/Linux

1. outw()函數(shù) Unix/Linux

inw_p()函數(shù) Unix/Linux

1. inw_p()函數(shù) Unix/Linux

setpgid()函數(shù) Unix/Linux

1. setpgid()函數(shù) Unix/Linux

quotactl()函數(shù) Unix/Linux

1. quotactl()函數(shù) Unix/Linux

prctl()函數(shù) Unix/Linux

1. prctl()函數(shù) Unix/Linux

fattach()函數(shù) Unix/Linux

1. fattach()函數(shù) Unix/Linux

readahead()函數(shù) Unix/Linux

1. readahead()函數(shù) Unix/Linux

msgget()函數(shù) Unix/Linux

1. msgget()函數(shù) Unix/Linux

gethostname()函數(shù) Unix/Linux

1. gethostname()函數(shù) Unix/Linux

semctl()函數(shù) Unix/Linux

1. semctl()函數(shù) Unix/Linux

munlockall()函數(shù) Unix/Linux

1. munlockall()函數(shù) Unix/Linux

iopl()函數(shù) Unix/Linux

1. iopl()函數(shù) Unix/Linux

fdetach()函數(shù) Unix/Linux

1. fdetach()函數(shù) Unix/Linux

getuid()函數(shù) Unix/Linux

1. getuid()函數(shù) Unix/Linux

gettid()函數(shù) Unix/Linux

1. gettid()函數(shù) Unix/Linux

pwrite()函數(shù) Unix/Linux

1. pwrite()函數(shù) Unix/Linux

isastream()函數(shù) Unix/Linux

1. isastream()函數(shù) Unix/Linux

get_thread_area()函數(shù) Unix/Linux

1. get_thread_area()函數(shù) Unix/Linux

mpx()函數(shù) Unix/Linux

1. mpx()函數(shù) Unix/Linux

io_getevents()函數(shù) Unix/Linux

1. io_getevents()函數(shù) Unix/Linux

lstat()函數(shù) Unix/Linux

1. lstat()函數(shù) Unix/Linux

readv()函數(shù) Unix/Linux

1. readv()函數(shù) Unix/Linux

exit()函數(shù) Unix/Linux

1. exit()函數(shù) Unix/Linux

inw()函數(shù) Unix/Linux

1. inw()函數(shù) Unix/Linux

fchmod()函數(shù) Unix/Linux

1. fchmod()函數(shù) Unix/Linux

mq_getsetattr()函數(shù) Unix/Linux

1. mq_getsetattr()函數(shù) Unix/Linux

get_robust_list()函數(shù) Unix/Linux

1. get_robust_list()函數(shù) Unix/Linux

_llseek()函數(shù) Unix/Linux

1. _llseek()函數(shù) Unix/Linux

gettimeofday()函數(shù) Unix/Linux

1. gettimeofday()函數(shù) Unix/Linux

nice()函數(shù) Unix/Linux

1. nice()函數(shù) Unix/Linux

security()函數(shù) Unix/Linux

1. security()函數(shù) Unix/Linux

sched_get_priority_max()函數(shù) Unix/Linux

1. sched_get_priority_max()函數(shù) Unix/Linux

outb_p()函數(shù) Unix/Linux

1. outb_p()函數(shù) Unix/Linux

intro()函數(shù) Unix/Linux

1. intro()函數(shù) Unix/Linux

alarm()函數(shù) Unix/Linux

1. alarm()函數(shù) Unix/Linux

putmsg()函數(shù) Unix/Linux

1. putmsg()函數(shù) Unix/Linux

fork()函數(shù) Unix/Linux

1. fork()函數(shù) Unix/Linux

getpgrp()函數(shù) Unix/Linux

1. getpgrp()函數(shù) Unix/Linux

link()函數(shù) Unix/Linux

1. link()函數(shù) Unix/Linux

getcwd()函數(shù) Unix/Linux

1. getcwd()函數(shù) Unix/Linux

insl()函數(shù) Unix/Linux

1. insl()函數(shù) Unix/Linux

getsockname()函數(shù) Unix/Linux

1. getsockname()函數(shù) Unix/Linux

dup()函數(shù) Unix/Linux

1. dup()函數(shù) Unix/Linux

connect()函數(shù) Unix/Linux

1. connect()函數(shù) Unix/Linux

select()函數(shù) Unix/Linux

1. select()函數(shù) Unix/Linux

futex()函數(shù) Unix/Linux

1. futex()函數(shù) Unix/Linux

outsw()函數(shù) Unix/Linux

1. outsw()函數(shù) Unix/Linux

query_module()函數(shù) Unix/Linux

1. query_module()函數(shù) Unix/Linux

reboot()函數(shù) Unix/Linux

1. reboot()函數(shù) Unix/Linux

create_module()函數(shù) Unix/Linux

1. create_module()函數(shù) Unix/Linux

adjtimex()函數(shù) Unix/Linux

1. adjtimex()函數(shù) Unix/Linux

mlock()函數(shù) Unix/Linux

1. mlock()函數(shù) Unix/Linux

statvfs()函數(shù) Unix/Linux

1. statvfs()函數(shù) Unix/Linux

gtty()函數(shù) Unix/Linux

1. gtty()函數(shù) Unix/Linux

epoll_create()函數(shù) Unix/Linux

1. epoll_create()函數(shù) Unix/Linux

bind()函數(shù) Unix/Linux

1. bind()函數(shù) Unix/Linux

inl_p()函數(shù) Unix/Linux

1. inl_p()函數(shù) Unix/Linux

select_tut()函數(shù) Unix/Linux

1. select_tut()函數(shù) Unix/Linux

mincore()函數(shù) Unix/Linux

1. mincore()函數(shù) Unix/Linux

getresuid()函數(shù) Unix/Linux

1. getresuid()函數(shù) Unix/Linux

getpmsg()函數(shù) Unix/Linux

1. getpmsg()函數(shù) Unix/Linux

getcontext()函數(shù) Unix/Linux

1. getcontext()函數(shù) Unix/Linux

killpg()函數(shù) Unix/Linux

1. killpg()函數(shù) Unix/Linux

olduname()函數(shù) Unix/Linux

1. olduname()函數(shù) Unix/Linux

openat()函數(shù) Unix/Linux

1. openat()函數(shù) Unix/Linux

pause()函數(shù) Unix/Linux

1. pause()函數(shù) Unix/Linux

alloc_hugepages()函數(shù) Unix/Linux

1. alloc_hugepages()函數(shù) Unix/Linux

ioctl_list()函數(shù) Unix/Linux

1. ioctl_list()函數(shù) Unix/Linux

readlinkat()函數(shù) Unix/Linux

1. readlinkat()函數(shù) Unix/Linux

mprotect()函數(shù) Unix/Linux

1. mprotect()函數(shù) Unix/Linux

getdomainname()函數(shù) Unix/Linux

1. getdomainname()函數(shù) Unix/Linux

readlink()函數(shù) Unix/Linux

1. readlink()函數(shù) Unix/Linux

madvise()函數(shù) Unix/Linux

1. madvise()函數(shù) Unix/Linux

bdflush()函數(shù) Unix/Linux

1. bdflush()函數(shù) Unix/Linux

ipc()函數(shù) Unix/Linux

1. ipc()函數(shù) Unix/Linux

ptrace()函數(shù) Unix/Linux

1. ptrace()函數(shù) Unix/Linux

getrusage()函數(shù) Unix/Linux

1. getrusage()函數(shù) Unix/Linux

msync()函數(shù) Unix/Linux

1. msync()函數(shù) Unix/Linux

faccessat()函數(shù) Unix/Linux

1. faccessat()函數(shù) Unix/Linux

modify_ldt()函數(shù) Unix/Linux

1. modify_ldt()函數(shù) Unix/Linux

get_kernel_syms()函數(shù) Unix/Linux

1. get_kernel_syms()函數(shù) Unix/Linux

getpid()函數(shù) Unix/Linux

1. getpid()函數(shù) Unix/Linux

fsync()函數(shù) Unix/Linux

1. fsync()函數(shù) Unix/Linux

msgctl()函數(shù) Unix/Linux

1. msgctl()函數(shù) Unix/Linux

break未實(shí)現(xiàn) Unix/Linux

1. break未實(shí)現(xiàn) Unix/Linux

sched_setparam()函數(shù) Unix/Linux

1. sched_setparam()函數(shù) Unix/Linux

fchown()函數(shù) Unix/Linux

1. fchown()函數(shù) Unix/Linux

cacheflush()函數(shù) Unix/Linux

1. cacheflush()函數(shù) Unix/Linux

fdatasync()函數(shù) Unix/Linux

1. fdatasync()函數(shù) Unix/Linux

flock()函數(shù) Unix/Linux

1. flock()函數(shù) Unix/Linux

pivot_root()函數(shù) Unix/Linux

1. pivot_root()函數(shù) Unix/Linux

inotify_init()函數(shù) Unix/Linux

1. inotify_init()函數(shù) Unix/Linux

fchmodat()函數(shù) Unix/Linux

1. fchmodat()函數(shù) Unix/Linux

keyctl()函數(shù) Unix/Linux

1. keyctl()函數(shù) Unix/Linux

llseek()函數(shù) Unix/Linux

1. llseek()函數(shù) Unix/Linux

outb()函數(shù) Unix/Linux

1. outb()函數(shù) Unix/Linux

pipe()函數(shù) Unix/Linux

1. pipe()函數(shù) Unix/Linux

io_submit()函數(shù) Unix/Linux

1. io_submit()函數(shù) Unix/Linux

ppoll()函數(shù) Unix/Linux

1. ppoll()函數(shù) Unix/Linux

multiplexer()函數(shù) Unix/Linux

1. multiplexer()函數(shù) Unix/Linux

access()函數(shù) Unix/Linux

1. access()函數(shù) Unix/Linux

sched_getparam()函數(shù) Unix/Linux

1. sched_getparam()函數(shù) Unix/Linux

chown()函數(shù) Unix/Linux

1. chown()函數(shù) Unix/Linux

readdir()函數(shù) Unix/Linux

1. readdir()函數(shù) Unix/Linux

inb_p()函數(shù) Unix/Linux

1. inb_p()函數(shù) Unix/Linux

outsl()函數(shù) Unix/Linux

1. outsl()函數(shù) Unix/Linux

nanosleep()函數(shù) Unix/Linux

1. nanosleep()函數(shù) Unix/Linux

alloc_hugepages()函數(shù) Unix/Linux

1. alloc_hugepages()函數(shù) Unix/Linux

sbrk()函數(shù) Unix/Linux

1. sbrk()函數(shù) Unix/Linux

move_pages()函數(shù) Unix/Linux

1. move_pages()函數(shù) Unix/Linux

fchdir()函數(shù) Unix/Linux

1. fchdir()函數(shù) Unix/Linux

renameat()函數(shù) Unix/Linux

1. renameat()函數(shù) Unix/Linux

getppid()函數(shù) Unix/Linux

1. getppid()函數(shù) Unix/Linux

getsid()函數(shù) Unix/Linux

1. getsid()函數(shù) Unix/Linux

oldfstat()函數(shù) Unix/Linux

1. oldfstat()函數(shù) Unix/Linux

lseek()函數(shù) Unix/Linux

1. lseek()函數(shù) Unix/Linux

stat()函數(shù) Unix/Linux

1. stat()函數(shù) Unix/Linux

path_resolution()函數(shù) Unix/Linux

1. path_resolution()函數(shù) Unix/Linux

getunwind()函數(shù) Unix/Linux

1. getunwind()函數(shù) Unix/Linux

getsockopt()函數(shù) Unix/Linux

1. getsockopt()函數(shù) Unix/Linux

mmap2()函數(shù) Unix/Linux

1. mmap2()函數(shù) Unix/Linux

getdents()函數(shù) Unix/Linux

1. getdents()函數(shù) Unix/Linux

fchownat()函數(shù) Unix/Linux

1. fchownat()函數(shù) Unix/Linux

mkdir()函數(shù) Unix/Linux

1. mkdir()函數(shù) Unix/Linux

perfmonctl()函數(shù) Unix/Linux

1. perfmonctl()函數(shù) Unix/Linux

open()函數(shù) Unix/Linux

1. open()函數(shù) Unix/Linux

idle()函數(shù) Unix/Linux

1. idle()函數(shù) Unix/Linux

poll()函數(shù) Unix/Linux

1. poll()函數(shù) Unix/Linux

brk()函數(shù) Unix/Linux

1. brk()函數(shù) Unix/Linux

sched_setaffinity()函數(shù) Unix/Linux

1. sched_setaffinity()函數(shù) Unix/Linux

mlockall()函數(shù) Unix/Linux

1. mlockall()函數(shù) Unix/Linux

lseek()函數(shù) Unix/Linux

lseek - 重新讀取/寫(xiě)入文件偏移量

內(nèi)容簡(jiǎn)介

#include <sys/types.h>
#include <unistd.h>

off_t lseek(int fildes, off_t offset, int whence);

描述

The lseek() function repositions the offset of the open file associated with the file descriptor fildes to the argument offset according to the directive whence as follows:

標(biāo)簽	描述
SEEK_SET
	The offset is set to offset bytes.
SEEK_CUR
	The offset is set to its current location plus offset bytes.
SEEK_END
	The offset is set to the size of the file plus offset bytes.

The lseek() function allows the file offset to be set beyond the end of the file (but this does not change the size of the file). If data is later written at this yiibai, subsequent reads of the data in the gap (a "hole") return null bytes (’\0’) until data is actually written into the gap.

返回值

Upon successful completion, lseek() returns the resulting offset location as measured in bytes from the beginning of the file. Otherwise, a value of (off_t)-1 is returned and errnois set to indicate the error.

錯(cuò)誤

標(biāo)簽	描述
EBADF	fildes is not an open file descriptor.
EINVAL	whence is not one of SEEK_SET, SEEK_CUR, SEEK_END; or the resulting file offset would be negative, or beyond the end of a seekable device.
EOVERFLOW
	The resulting file offset cannot be represented in an off_t.
ESPIPE	fildes is associated with a pipe, socket, or FIFO.

遵循于

SVr4, 4.3BSD, POSIX.1-2001.

RESTRICTIONS

Some devices are incapable of seeking and POSIX does not specify which devices must support lseek().

Linux specific restrictions: using lseek() on a tty device returns ESPIPE.

注意

本文檔的使用那里的是英文不正確，但維持歷史原因。

當(dāng)與下面的宏轉(zhuǎn)換舊的代碼，用于何處替換值：

old	new
0	SEEK_SET
1	SEEK_CUR
2	SEEK_END
L_SET	SEEK_SET
L_INCR	SEEK_CUR
L_XTND	SEEK_END

SVr1-3 returns long instead of off_t, BSD returns int.

Note that file descriptors created by dup(2) or fork(2) share the current file position yiibaier, so seeking on such files may be subject to race conditions.

另請(qǐng)參閱

dup (2)
fork (2)
open (2)

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